I noticed recently that some of my old scripts using touch_start had stopped working.  I'll use llLoadURL as an example.

This is the script that I had been using without problems before:

default

{

    touch_start(integer total_number)

    {

        llLoadURL(llDetectedKey(0), "Google", "http://www.google.com");

    }

}

 I noticed that the script had quit working and now I found out why.  The script needs a state_entry event to preceed the touch_start event for it to work.  Previous OS versions did not require this, but apparently now it's required.  Here's the corrected script:

default

{

    state_entry()

    {

        llSleep(0.5); //do something here

    }

    touch_start(integer total_number)

    {

        llLoadURL(llDetectedKey(0), "Google", "http://www.google.com");

    }

}

That little issue has caused me some problems, so I thought I would mention it here.  This applies (at least) to any scripts using touch_start.  The LSL wiki has several script examples that don't have this, including llLoadURL, so beware.